US877403A - Rapid-traverse device for boring-mills. - Google Patents

Description

No. 877,403. PATBNTED JAN. 21, 1908. E. P. BULLARD a; B. H-BNRIKsoN. RAPIDTRAVERSE DEVIGE PoR 'BORING MILLS.

APPLIUATION FILED MAB. 16. 1906.

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II. I. BULLARDl Il E. HENRIKSON. RAPID TRAVERSI; DEVICE PoR BORING MILLS.

' APPLIATION FILED 11.12.3.16; 190s.

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E. P. BULLARD a E. HENRIKSON.

RAPID TRAVERSE DEVICE POR BORING MILLS. APPLICATION FILED 111111.16. 1900.

3 SHEETS-SHEET 3'.

matita BULLARD,

p own that vxwegEDWARI'J P.' BULLARD andjEMaNiiEL 1iuiis-ou, citizens of the United States,"bandv rfe'sidents of Bridgeport, in the ',ciounftyof'v Fairlield. and State of Connecticut,` haveinvenjtedcertain new and useful Improvements in Rapid-Traverse Devices for Boring-Mills, of `which the followhis Vinvention"relates to lnew and useful improvements, in' boring mills and similar machine tools andparticularly to mechanism for quickly shifting and 'setting the heads ingis ja specification;

' and tools" of such machines;

4Irleretofore boring mills of lthis class have lbeen connected to. operatively 'feed the tool forward slowly, .bothcrosswise and vertically -in'operatin yupon apiece of Work, and could bes'run vbac r by' reversingthe same mechanism, wl'iich'however being operated at a very slow speed,-wasrobjectionable These feeds have also been-o eratedl in some instances -by hand power w 'chewing to the labor involved in setting thehead, vand likewise on account of the 4slowness with which it was accomplished Was likewisenunpopular.

It is thereforethe ypurpose of this invention toprovide operative connections with the feed shafts, of,tlie`heads,`and tool slides, Whereby'tlie said; parts` may be4 driven by power-ln ei'thercfdirection, and es e'cially to providfedii addition thereto, `mcc anism for driving'isaid'part fgby power rapidly, thus enablin u' the `O erator toquickly set or reset the tobf'infadmstin lff'tfrnew work, or the resetting'of 'the tool orlnei'vcuts, as the case may require. Furtherftoldesign said mechanism," in 'a simple and,"durable manner and i capable offbeingmaniplated conveniently.

` Machine tools'- ofj the above class are com- `monly'jmade 'in singleiandt double head machjnesfand'oiir improved 'rapid traverse device isequallyapplicable to either a single or. a'doublefhead machine as Will be apparent from." the following detailed' description.

Referrin to `the vacc-or'npanying three sheets of v 'awin s'fforming a part of this speci-iieati'on-,"simi ar characters of reference will be eoimd denote.` -likefor corresponding parts'thoughoutfithe r several figures and totl Figure Y perspective view of amimproved yggileoi,l .double head boring mill containingvpur Y novel v i quick traverse @l speciacatioaof Letters Patent.

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ND "riassunti Hemiksem or" TBRIDGEPORT, CONNECTICUT,

p g p y, 'LLanDaiAcniN'ErooL COMPANY, or'BRInGEPoR'r, ooN- NECTIQUT,.i'CQRBQBATIQN-QFCONSEGTICUT# i -n'AnTRAvRsE DEVICE" Fort BomNG-mLLsil v ratentedjJan. 21,'1908.

mechanism. Flo. 2, shows a rear perspective view of a part ot the machine shown in Fig. 1, illustrating more particularly the operative connections for the cross' rail and head. Fig. 3,- shows on an enlarged scale a front elevation of the lever connections for operating our quick power traverse mechanism. Fig. 4, is a detail vertical sectional view of the sliding gear speed changing device shown in Figs. 1, 2 and 5. Fig. 5. is a detached and broken vertical sectional view on a smaller;

scale, of the intermediate driving shaft and operative connection therewith. Fig. 6, is a central vertical sectional view of the mechanism shown in Fig. 3 and taken at aright an le to the sec-tion line of Fig. .5.

nk Fig. 1 ofthe drawings, we have shown a double headed boring mill including dupli- "cate saddles, swivel plates, tool slides etc., one of such heads being located to either side ofthe machine. and eac-h operated independently of the other as is usually the case in this class of machines. This construction enables the user to operateboth or but one head ata time, as may be best suited to the particular piece of' work being operated upon. In a double headed machine of this sort, our mechanism is likewise made in duplicate, each set being loca-ted on the respectivesides 4ot the machine to whichthe heads areatof view, however, of the drawing shown in Fig. .1, the duplicate rapid traverse mechanism on the far side of the machine doesnot y appear, this however. is immaterial as the yinvention is complete on each side and may be used'in duplicate or not according to its application to different styles of machines.

Referringin detail to the charactersof reference marked upon `the drawings and especially Figs. 1 and 2, 10 indicates the base of aboring mill and 11 side uprights of the fra-me, having vertical ways 12 to receive the' cross rail 13 slide-bly connected and adapted to be raised and lowered thereon in the usual or any preferred A'mannen The two set-s of tool carrying mechanisms are mounted upon this. rail, but as our'invention may Lrelate tohut one set only and for convenience of description we will refer to thc knear set shown in Fig. 1, of" the drawing. and in which 14 indicates a saddle slidably mount-ed I j brackets 16 and 17 of the rail.

in either direction thereon, lby the threaded feed 'shaft 15 shown'j'ournaled in the brackets 16 and 17v of therail. Upon the saddle is aswiveled guide plate18 which slid'ably su lorts the tool slide"1f9 carrying the tool hold) ers 2() in which cutting tools of various styles and sizes'may be secured. The

slide 1'9 may be connected in any preferred manner to be raised and lowered through the ,medium of a feed shaft 21 journaled 1n the Both ofthe lshafts'15 land 21 are connected by "special ear and clutch-mechanism not shown but ormin'g subject matter of a companion application with the short shaft 22 on the back of the end of the rail. Thisy short shaft may .drive the shafts 1'5 and 21 either separately or together and in either a forwardy or backward direction accordinfr to the direction of rotation of said short shaft.

23 represents the work table which is operatively connected to rotate in the usual l. wayin the performance of the several operations.

y mg shaft 25,'the end of 1which also appears in Power'is ap lied to themachine through ulley 24 (see ig. 1) mounted upon a driv- Fig. 1. From this shaft power is communiv cated through a s ecial changeable speed mechanism inclose within the speed box 26 and connections not shown, with an inclosed cross shaft 27 shown in Fig. 5. This changeable speed mechanism as well asv the operative connections form the subject matter of Sleeve.

al separate application and we will consequently omit a detail description of the same here. A

The* foregoing mechanisms togetherl with many of the other details shown and not described are immaterial 4features of our present invention, and are only shownto properly illustrate the application of our device to a machineofthis klnd, and we will purposely vomit a further detailed description of the same for theI sake of'clearness and expediency. V

The cross shaft 27 journaled in a casing 28 secured to the side of the upright and is connected to drive thevvertical sleeve 29 also journaled in a bearin of said casing, 1n

either a forward or bac ward direction, and

at several dierent speeds. The changes of s eeds are effected through the operation of t e clutch 30 and the-slide 'engage the note several cutting operations performed'by the machine are effected through the operation of the feed rod 35 while in its intermediate position (see Figs. 3 and'5) and by reason of the changeable gear connections contained within the: casing 28 said feed rod may be driven at a'l'number ofdifferent speeds,v all of which however are comparatively slow,.as would be necessary for feeding the tool. This feed rod is also provided with a rapid driving connection whereby the tool may be quickly run up and down or in and out, as the occasion may require, when setting the tool as inv starting to work, which connections are as follows: A high speed shaft 36 is journaled in brackets 37 on the to of the sides 11 of the frame and carries a Ibelt pulley 38 ydirectly connected with the main eol driving shaft 25, by a belt 39 as shown. A

friction gear 4() mountedupon this high speed shaft is normally disengaged as shown 'in the several figures of the drawingsbutis adapted to beengaged by either the upper friction gear- 41 or the lower friction gear 42 secured to the upperend of the feed rod 35 journaled in the extension 37a of the bracket 37. The feed rod 1s also journaled in an intermediate bracket 43 which also formsl a casing for a sleeved bevel gear 44 s lidably splined tothe rod in a way to be driven t ereby, and operate a second bevelgear 45 secured to the inner end of the short shaft 22 before mentioned. It will thus be seen that the feed rod is free to be moved longitudinally through the sleeved bevel gear,.yet is connected to rotate the same therewith, in

, either direction and likewise operate the connecting bevel gear, short shaft etc.

As before stated the normal or intermediate position ofthe feed rod shown in Figs. 3 and 5, is that which connects with the changeable speed driving mechanism within the casin 28 and is thereby'adapted to feed the tool uring its operations. :This feedrod is slidably journaled in the brackets 37 and 43 and in a bore 46 of the sleeve 29 rotatably mounted inthe casing 28. The movable sleeve 34 contains an annular recess 47 to receive a loose split ring 48 pivotally connected to the lower arm of a bell crank lever 49 pivoted to a stud 50 secured to the casing v28.-

This lever is normally held to engage the clutches 33 and 34 by a spring'51 as seen in Fig. 3, but permits of the disengagement of said clutch when the feed rod operating lever 52 is in either of. its shifted ositions one of which is shown in Fig. 6. his lever 52 is pivoted to a studi53 secured to the casing`28 t an contains a s ring actuated pull pin 54 to fd fies 55 of the rack 56 to hold t,I e lever in either of its adjusted positions. The inner portion of the lever is bifurcated to -encircle the feed rod andconnections,

while vthe `inner end ycontains a roll 57 to ene gage the inner edge of the vertically diswith the opposite sides of the -The sleeve. 63 is further provided vwith a pe- Ain one direction in one instance, and in theV .other direction -in the other instance.

.tically, said adjustments being accomplished through the feed rod when operated from the l posed arm of the bell crank lever 52. Said I rollnorinally rest-s in the pocket 58 edge of said arm asseen in Fig. 3, but is adapted to ride out on either side shoulder 58"l thereby forcing the vertical arm ofthe lever out and lifting the inner arin which in turn raises the clutch sleeve 34 from engagement with the clutch 33 of thesleeve 29. It will thus be seen that either an upward or downward movement of the levery 52 will disconnect the feed rod from the sleeve 29 of' the feed mechanism and put said rod into engagement with the high speed shaft 36 to drive said feed rrod in either a forward or backward direction according to whether said rod is' raised or lowered.

The feed rod is threaded as at 59v to receive upperv and lowercollars 60 and y61 each of which is provided with annular side grooves to form bearin s for balls 62. A lever sleeve 63 1S supporte intermediate of the aforesaid collars and is also provided with annular grooves to correspond with those 'of the collars and to accommodate the balls therefor.

ripheral groove to receive a split collar 64 bearing trunnions 67 pivotall connecting it fever 52. This forms alight running bearing intermediate the lever andshaft to operatively s up ort the latter, and readily permits of this eed4 rod being raised or lowered to engage either the feed mechanism or the gears 41 or 42 one of which pulleys obviously operates said rod Within the bore of the sleeve- 29 we provide a cushion to be engaged by and support which cushion-com rises a piston 65 normally held distende by a spring 66 beneath it and within said bore in a way to also serve as a counter-balance for the weight of the feed rod and its attached mdchanism.

Reviewing the' operation of our device in connection with a machine of the class described, afterthe work has been secured to the rotary table 23. The ltlool would be quickly brought into position by adjusting the saddle sidewise and the tool slide 19 verfriction gears of the high speed sha'ft- 36. Said speed shaft being adapted to drive thev feed rod and tool in either a forward orback direction according to whether the upper or lower friction is in engagement. Wlhen the tool is set tothe proper positionto begin work the operating lever 52 is brought back to its intermediate normal positionas shown in Fig. 1, engages the sleeve of the rod with the sleeve 29 of t-he feed driving mechanism, and whereby vthe tool is fed forward in either a vertical or horizontal direction simultaneously with the rotary movement of the table.

Having thus described our invention what ofthe l we claim and' desire to secure by Letters Patent is 1. A rapid power traverse for boring mill tools, comprising driving mechanism," a

movable feed rod operatively related to said driving'mechanism, a tool bar having operative connections with the feed rod, an-mdependent high s eed shaft, gears connecting the latter and t e feed rod for engagingvthe feed rod-with the high speed shaft at prel determined pointsin the range of movement of thefeed rod, mechanism for engaging the feed rod with the driving mechanism when the feed rod is in a position intermediate of its range of movement, and for disengaging Vthe driving mechanism when the rod is engaged with the high s eed shaft, and means for operating'the. fee rod to render operative the connections between the same Vand the high speed shaft when therod is shifted from said intermediate position.

2. -A rapid power traverse for boring mill tools, comprising driving'v mechanism, a movable feed rod operatively related to said driving mechanism, a tool bar having operative connections with-the feed rod, an independent high spee'd shaft, gear connections etween the latter and the feed rod for engaging the feed. rod with the high speed shaft at predetermined oints in the ra e'of movement of the eed rod, a clutch intermediate the feed rod and driving mechanism, ada ted to be engaged with said driving mec anism when the rod is in lsuch inter#- mediate clutch an tively connect the same or disconnect it from the high speed shaft.

3. A rapid power traverse .for boring millA tools, comprising driving mechanism, a

movable feed rod operatively related to said driving mechanism, a tool bar having operative connections with the feed rod, an independent high speed shaft, gear connections (position, means for moving thel for shifting the feed rod to operaetween the latter and the feed rod for en 'aging the feed rod with the high speed sha a vclutch intermediate the .driving mechanism and feed rod, a'means for shifting and holding the feed rod in engagementwith the'high sengage it from the driving mechanism.

(sipeed shaft and also to movethe clutch t'o 4. A 'rapid power traverse for boring mill tools, comprising driving mechanism for feeding the tool, a longitudinal movable feed'rod connected with said drivin mechanism and having friction gears, `a to bar operatively connected with -said feed -rod, ahigh speed shaft bearing a friction gear, mechanism upon the feed rod for shifting the same to engage either of its friction gears 'with' that of t e speed shaft to operate' the feed rod inl eit er a forward or backward direction, and 4 means for simultaneously disconnecting said rod from the mechanism whenthe -5, In a ra id` oWer traverse device for boring mill ea s, the combination With driving mechanism for feeding said head, of an intermediate feed shaft operatively connected to said head, a clutch carried on the shaft for engagement with the driving mechanism, ,a high speed shaft bearing a friction gear, ya friction gear upon the feed shaft above and below the gear of the high s eed shaft, a lever connection for raising and 0W- ering -the feed rod and its friction gears for engagement With the gear of the high speed shaft, and mechanism connected With said lever for simultaneously disengaging the clutch of the shaft from the driving mechan- V ism, When the lever is operated to engage the friction gears before mentioned.

6. In a rapid traverse device for a boring mill head the combination with driving mechanism, of a feed rod and connections through Which the head is operated from said driving mechanism, a clutch sleeve slidably mounted upon the feed rod for engagement with the driving mechanism, a high speed shaft, gear connections on the feed rod for engagement With the high speed shaft by a movement of said rod, a pivotal lever supporting the feed rod and adapted to operate the same longitudinally to engage the high speed shaft, a bell crank lever connected with e clutch sleeve upon the feed shaft to disengage the said clutch sleeve from the driving mechanism by a movement of the pivotal lever before mentioned .and simultaneousl engage the driving connections with n the igh speed shaft.

7,. In a rapid traverse, of the class described the combination with driving,mechanism 1nv cluding a clutch face sleeve, of a longitudinally movable feed rod, a clutch sleeve upon the rod to normally engage With the sleeve of the driving mechanism, a bell crank lever to engage both the lever and the sleeve of the rod, an operating lever engaging the feed rod to move the same longitudinally and to engage said bell crank lever to operate the same by a movement of the lever ineither direction, a

' high speed shaft, and gear connections intermediate said shaft and the feed rod for engag l infr said hiffh` speed shaft when the rod is shifted to either an upper or lower position.

8. In a rapid traverse device, the combination With driving mechanism, of a feed rod operatively connected With the driving mechanism, a high speed shaft, mechanism upon the feed rod for engagement With the high speed shaft by a longitudinal movement of the feed rod, a lever for operating said rod longitudinally, a cushion to counter-balance the weight of the feed rod, and mechanism vfor rendering inoperativethe o erative connections intermediate of the eed rod and driving mechanism with the operation of the lever, and simultaneously connecting the said rod with the high speed shaft.

vSigned at Braidentown, Manatee county, Florida,this 5 day of March, 1906.

EDV/'ARD P. BULLARD.

Witnesses as to Bullard: O. K. REAvEs, JN0. B. SINGELTARY,

Signed at Bridgeport, Fairfield county, Connecticut, this 14 day of March, 1906.

` EMANUEL HENRIKSON;

Witnesses as to Henrikson: G. N. MoRnHoUsE,

P.'BULLARD, Jr. v

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